/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraRendererRibbons.h
static void GenerateShapeStateCustom ( [FNiagaraRibbonShapeGeometryData](API\Plugins\Niagara\FNiagaraRibbonShapeGeometryData) & State, const [TArray](API\Runtime\Core\Containers\TArray)< [FNiagaraRibbonShapeCustomVertex](API\Plugins\Niagara\FNiagaraRibbonShapeCustomVertex) > & CustomVertices, bool bUseMaterialBackfaceCulling )